Cooling system for a motor-vehicle internal combustion engine

Details Cooling system for a motor-vehicle internal combustion engine Cooling system for a motor-vehicle internal combustion engine

1998-07-28

2000-11-28

Wolfe, Willis R.

Internal-combustion engines

Cooling

Interrelated coolant flow and throttle control

123 4101, F01P 714

Patent

active

061520888

ABSTRACT:
A cooling system for an internal combustion engine of a motor-vehicle has two separate cooling circuits for the cylinder head and the engine block. The cooling fluid which flows through the cylinder head circulates through a radiator in all operating conditions of the cooling system. The cooling fluid which flows through the engine block is instead de-routed so that it does not flow through the radiator and, when it comes out of the engine block, is fed into a conduit at the outlet from the head so that the engine block is kept at a temperature greater than that of the head. An electronic control unit controls the adjustment of a pump for activating the circulation of the cooling fluid, and a flow control valve which de-routes a portion of the cooling fluid at the outlet of the pump towards the engine block. The electronic control unit carries out the above regulations as a function of signals directed thereto from a plurality of sensors which are indicative of a number of engine operating parameters.

REFERENCES:
patent: 4352342 (1982-10-01), Cser et al.
patent: 4369738 (1983-01-01), Hirayama
patent: 4381736 (1983-05-01), Hirayama
patent: 4423705 (1984-01-01), Morita et al.
patent: 4539942 (1985-09-01), Kobayashi et al.
patent: 5386805 (1995-02-01), Abe et al.

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